Harrow



(No Model.)

J; H. HARRIS.

HARROW. M No. 306,746. Patented Oct. 21, 1884..

o m o QLWM M Z iii a improvements attached thereto.

JOHN HENRY HARRIS, or

Miran TATES,

ATENT rricn.

ST. PAUL, MINNESOTA.

HARROW.

SPECIFICATION forming part of Letters Patent No. 306,746, dated October 21, 1884.

Application filed January 28, 1884. (X model.)

ToaZZ whom it may concern Be it known that I, JOHN HENRY HARRIS, a citizen of the United States, and a resident of St. Paul, in the county of Ramsey, in the State of Minnesota, have invented certain new and useful Improvements in Harrows, of which the following specification is a full, clear, and exact description, reference being also had to the accompanying drawings, in which Figure l is a plan view, and Fig. 2 is a rear elevation, of a harrow complete, showing my Fig. 3 is an enlarged side view of a tooth and portion of a tooth-bar to which it is attached. Fig. 4 is an enlarged sectional view across a tooth-bar and front view of a tooth attached thereto, and Fig. 5 is an enlarged sectional plan view of one of the tooth-holders. Figs. 6, 7, S, and 9 are enlarged detached perspective views of the different parts of oneof the tooth-holders. Fig. 10 is a perspective view of a section of one of the tooth-bars and a section of one of the auxiliary bars, showing the method of clamping them together.

A A are the tooth-bars B B" B, the braces connecting the tooth-bars to each other in the ordinary manner, forming what is known as two ordinary Scotch or diagonal harrowsone a right-hand and the other a reversed or left-hand l1arrowand both connected to one common evener or bar, 0, by chains or other suitable flexible couplings, I), while the single tree D and whiffletrees E E are connected to this evener by rods or chains 6. In the ordinary diagonal harrow, the draft being from one corner only, the harrow draws heavily, and isliable to vibrate upon its single connection to the single-tree, thus rendering its action uneven, and to avoid this two ordinary diagonal harrows are attached to one evener, 0, (one of the harrows being reversed,) whereby all the advantages of the ordinary diagonal harrow are retained, and, in addition, alltendency to vibrate upon its couplings is prevented. This arrangement leaves an A-shaped open space, (1, between the harrows, and to fill this space and secure an unbroken line of teeth across the full width of both harrows I attach to the inner tooth-bar of one harrow an auxiliary tooth-bar, F, parallel with the tooth-bars of the opposite harrow, and attach in the same manner to this auxiliary bar F a adjacent bars A, so that all the teeth will form furrows with equal spaces between them, and with no break between the two harrows, the bars F G completely bridging the space d and securing an unbroken line of teeth across the whole harrow, as shown in Fig. 2. By this improved construction are obtained all the advantages of the hinged or flexible barrow combined with the diagonal harrow, and at the same time, in turning curves or corners, the tooth-bars retain the same relative positions, so that-no break or open space occurs between the sections.

The bars F and G may be attached to the bars A and to each other in any desired manner; but I have found that two angular metal plates, 0 e", clasping the upper and lower side of the ends of the bars F and A and F and G, and attached thereto by bolts t, or other similar fastenings, form a convenient, simple, and very strong clamp.

a a represent the teeth of the harrow, which maybe made in any desired form, either round, square, oblong, diamond-shaped, as shown, or in any other form. I secure the teeth to the bars A by means of eyebolts g, which clasp the teeth, and are passed backward through the bars, and also through interposed plates H, as shown, and are secured to the bars A by nuts 9". The plates H are formed with grooves or hollows h across their front faces, in which the teeth a tit, and are also provided with curved slots it", having their inner edges ser- 0 rated, into which serrations pins i on plates 13", set into the faces of the bars A in the rear of the plates H, are adapted. to fit, to hold the plates H from revolving upon the bolts 9. By this simple means the teeth may be firmly held and clamped to the bars A, and by loosening the nuts 9' and drawing the plates H I outward until the pins t are clear of the serrations in the slots h the plates H may be revolved upon the bolts g to any extent to set the teeth a at any desired angle, and then clamped up again to bring the pin into a new serration. The teeth may thus be set and held at any desiredangle. The serrations may he placed upon the outside of the disk H, il'

pre'ierred, the pin 1? having a side bend or projection to fit such serrations.

' iliary bars being secured to the contiguous i tooth-bars by bolt-plates a a, and held in place I by the rear brace-bar, B, of the harrow.

i 2. The combination, with a tooth-bar, A, and tooth a, of an eyebolt, grooved disk IT, I having a curved slot, If, and serrations at its i margin, and a pin, 1?, attached to the teeth- 1 bar, substantially as and for thopurpose herei in specified.

I In testimony whereof I have hereunto set i my hand in presence of two subscribing wit i nesses.

i JOHX HENRY .IIAIIIRIS.

'llitnesses:

4 (J. N. TOOIHV'ARD,

| Lows Fnnsnn, Sr. 

